Dairy barn traveling stanchion

Claim 1

IN AN AUTOMATIC BARN SYSTEM HAVING A BARN STRUCTURE, A MONORAIL DISPOSED WITHIN SAID BARN, A PLURALITY OF TROLLEY ASSEMBLIES CARRIED BY SAID MONORAIL, YOKE ASSEMBLIES FOR RESTRICTING THE MOVEMENT OF ANIMALS, SAID YOKE ASSEMBLIES BEING CARRIED BY SAID TROLLEY ASSEMBLIES, SAID YOKE ASSEMBLIES EACH INCLUDING A YOKE FOR TETHERING AN ANIMAL BY ITS NECK, A BAR EXTENDING UPWARDLY FROM SAID YOKE, SAID TROLLEY ASSEMBLY MOVABLY RECEIVING SAID BAR FOR ESSENTIALLY VERTICAL MOVEMENT WITH RESPECT TO SAID TROLLEY ASSEMBLY, SAID TROLLEY ASSEMBLY PREVENTING ANY APPRECIABLE HORIZONTAL MOVEMENT OF SAID BAR EXCEPT ALONG A PATH ESSENTIALLY PARALLEL TO SAID MONORAIL, SAID MONORAIL FORMING ESSENTIALLY A CLOSED TRACK HAVING A PLURALITY OF STALL TRACKS AND AN ENTRANCE AND RETURN TRACK, SAID STALL TRACKS BEING SELECTIVELY SWITCHABLE TO ENGAGE SAID ENTRANCE AND RETURN TRACKS WHEREBY THE ANIMALS TETHERED BY THE RESPECTIVE YOKES MAY BE DIRECTED ALONG